Air Resources Board

A California think tank warns the state has reached the tough part of its climate goals — which includes cleaning up cars.

California sues Trump administration over tailpipe emissions laws. State looks to combat Amazon deforestation. 'Public charge' rule sows fear.

Washington's move raises the specter of worsening air quality, jeopardizing public health and hindering California’s ability to battle climate change.

With California enmeshed in a bare-knuckled battle over clean air with the Trump administration, carmakers could soon face a choice: Sign onto the state's pact to cut air pollution or forfeit the right to offer customers the state's EV rebate.  

California made its own tailpipe emissions deal with four major carmakers, officials said Thursday, ignoring Trump administration threats to roll back Obama-era vehicle standards.

California’s climate change enforcers are grappling with the thorniest of controversies: how to prevent the planet’s tropical forests from disappearing. The question they aren’t ready to answer—at least not yet—is what focusing on far-away forests could mean for pollution at home.

After efforts to unite the West under a carbon-trading program stalled for nearly a decade, Oregon will decide this month whether it wants to follow in California’s footsteps. This bill would make Oregon the second state after California to rely on the market for emissions reductions throughout the entire economy. Supporters say that expanding the cap-and-trade market to Oregon could increase competition, lower compliance costs, and speed decarbonization of the West. But others worry a failure in Oregon could hurt carbon trading's chances in other states.

California transportation officials warn the fight over passenger vehicle standards might affect air quality, construction jobs, the economy — and ensure Californians stay stuck in traffic.

r Resources Board chair delivers message to auto industry. Proposed clean water tax hits snag. California Democrats prepare to elect new chair.

Unless the emissions trend is reversed, the state could stall on its route to clean air.